System for multiple voice lines with data over a single subscriber loop
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United States of America Patent
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Jun 8, 2004
Grant Date -
N/A
app pub date -
Sep 20, 1999
filing date -
Sep 21, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system that provides additional voice lines with data over a single two-wire subscriber loop. At the subscriber premise, one or more telephone instruments and data devices are connected to a digital modem into either a voice or a data interface. Analog voice signals are PCM sampled then packetized, and voice and data packets are transmitted to a CO modem over the subscriber loop. The CO modem depacketizes the voice packets into PCM format and transmits PCM voice information to a CO switch over a standard digital trunk interface. Data packets are routed to a data network. Voice packets are given transmission priority over data packets to ensures that voice is transported in the presence of data with low latency.
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